Patent GB-329679-A (GB)
Title: Improvements in book paging machines
IPC: B42D9/08
Filed: 1929-02-23
Abstract: 329,679. Corfe, W. Feb. 23, 1929. Number-printing apparatus. - I n book - paging or numbering machines each opposing pair of pages of a book are numbered simultaneously at each operation of the machine by means of two sets of opposed type discs, each set comprising separately rotatable concentric discs for units, tens, and hundreds. The printing-head d, Fig. 1, carrying the type discs arranged as upper and lower sets is mounted on a carriage 4 provided at its sides with rollers 6 which guide it within horizontal slots 8 in the frame. Connection between an operating-treadle 3 and the carriage is established by a rod 9 pivoted to one arm of a bell-crank lever 10, the other arm of the bell crank being engaged within a slot in the carriage. A spring 13 returns the treadle after each operation. The book is held upon a work table 14, Fig. 3, with one page a below one set of type discs and the next page b above the other set, the correct position being determined by a corner gauge on the upper of two thin plates 15- fixed to the printing-head. When the treadle is depressed the printing-head is moved forward into position between the pages, and simultaneously a pair of impression platens 16, 17 are rocked to press the pages upon the types. Movement of the upper platen 16 is effected by mounting it upon a link 18, Fig. 1, keyed upon a shaft 19 which is journaled in the sliding carriage, a link 20 also keyed to the shaft 19 being connected to a link 22 which is pivoted at 23 to the machine frame, so that movement of the carriage produces movement of the platen 16. The lower platen 17 mounted on an arm 24 keyed to a shaft 25 on the carriage is actuated similarly by links 26, 28 connected between the shaft 25 and a fixed pivot 29. After numbering, the lower leaf a, Fig. 3, is swept downwardly by a flicker arm 65. comprising one of a pair of arms pivoted at 66 and arranged so that one arm is always positioned between the pages during printing. The arms are rotated by a pinion 67 engaged by a rack 68 which is reciprocated vertically by a rocking lever 69 linked to the treadle. The flicker arms are loosely mounted on the boss of the pinion 67 and operatively connected thereto by spring-controlled pins provided with bevelled ends which, during one movement of the rack-bar, engage the edges of recesses in the bosses of the arms, causing an arm to be swung through half a revolution, and to slip idly on the return movement of the rackbar. The two sets of type discs in the printing- bead each comprise three concentrically rotatable type discs 80 - - 82, Fig. 6, the upper set being rotatable upon an axial pin 83 secured to atop plate 5<a>, the lower set being supported upon a. pin 84 which is mounted in a slot in a bottom plate 5<b> and arranged to be moved laterally to the upper set. The inner type disc 80 of the upper set carries the units digits, the middle disc 81 the tens, and the outer disc 82 the hundreds, this arrangement being reversed in the lower set. At the beginning of a paging operation the discs are in the positions shown in Fig. 6, with both units discs in alignment in the printing position. When the units discs have each made a complete revolution the " carry over " from units to tens is made in known manner, and at the same time a cam 86 on the lower units disc lifts a pivoted latch 87 from a notched detent 90, allowing a spring 92 to move the lower set of discs laterally until the latch engages the next step of the detent. In this position the lower units disc 82 is below the tens disc of the upper set, and in the succeeding position it is below the hundreds disc of the upper set. The rotation of discs to print. successive numbers is effected in known manner by pawl and ratchet mechanisms, Set-off preventing.-To prevent offset, the faces of the impression platens 16, 17, Figs. 1 and 3, are covered by an endless tape which is fed progressively at each upward movement of the treadle by means of a pair of gripping-jaws 55, 58, carried by a lever 53, Fig. 2 (not shown) connected to the treadle by a link 60. The jaws are separated and move over the tape when the treadle is depressed, and close again on the upward movement to pull a length of tape across the platens 16, 17, a series of guide rollers being provided to enable a strip of considerable length to be used. Inking-apparatus. - Inking of the two sets of type-discs is effected by apparatus comprising a large wheel-like roller 32, Fig. 3, which rotates in contact with a supply roller 31 and distributes ink periodically to inking-rollers 37 mounted one . on each side of the printing-head, at the ends of arms 38 which are pivoted at the upper end of a rocking arm 40 and are connected together by a spring 46. The rollers 37 are moved to and fro between the distributing-roller 32 and the inking position by a bell-crank 42 and a returning-spring 47 connected to the arm 40. The distributing- roller 32 is rotated intermittently by a ratchet 35 on its shaft coacting with pawls 33, 34 connected to a bell-crank 10 which is rocked by the treadle lever, and a corresponding rotation is imparted bv it to the ink-supply roller 31. The supplv roller 31 is also rocked obliquely to the distributing-roller 32 to spread the ink over the periphery thereof, this being effected bv mounting the roller 31 upon a long boss within bearings in the limbs of a forked member 101 pivoted on a spindle 102 in a bracket 103. On each side of the roller 31 the boss is provided with a lug 108 adapted to co-operate with a catch 105 pivoted on the bracket 103 and controlled by a spring 106. The roller 31 is initially set obliquely to the distributing-roller 32 so that, as the latter rotates, the boss of the roller 31 moves longitudinally within its supporting-brackets and the roller travels obliquely across the distributing-roller 32, whereupon a lug 108 is brought against its co-operating catch 105 and the forked member 101 is kicked around on its spindle 102.